<!DOCTYPE html>
<html lang="en" xmlns:th="https://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<h1 align="center">登录</h1>
<hr>

<p align="center" th:text="${msg}" style="color: red"></p>

<form th:action="@{/login}">
  <p align="center">用户名：<input type="text" name="username"></p>
  <p align="center">密  码：<input type="text" name="password"></p>
  <p align="center"><input type="submit"></p>
</form>

<a th:href="@{/zz}">注册</a>
</body>
</html>